CSP生产SPA-H钢铸坯纵裂纹的研究  

Longitudinal cracks on the surface of SPA-H steel slab by CSP

作　　者：彭其春[1] 童志博[1] 杨柳[1] 邹健[1] 刘炳宇[2] 钱龙[2] 李具中[2] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]武汉钢铁(集团)公司,湖北武汉430080

出　　处：《武汉科技大学学报》2012年第5期325-329,共5页Journal of Wuhan University of Science and Technology

摘　　要：通过金相组织分析、扫描电镜和能谱分析,运用统计学方法,对某厂CSP生产SPA-H钢表面纵裂纹的产生规律进行研究。结果表明,由于Ti、Al元素进入保护渣、钢水过热度较低、渣化不良等因素导致铸坯表面传热不均,部分位置形成凹陷,凝固收缩后在坯壳薄弱处因应力集中而产生开裂。By means of metallographic analysis,scanning electron microscope（SEM）,and energy spectrum analysis,the development of longitudinal cracks on the surface of SPA-H steel was studied.To find out the causes of longitudinal cracks,statistical method was employed.The result shows that,the change in mould powder owing to Ti and Al elements,low overheating degree,and bad slag smelting result in bad heat transfer on the steel slab surface and depression in some places.After solidifying contraction,the stress concentration in the weak places of solidified shell will produce cracks.

关 键 词：CSP 表面纵裂纹 低碳钢 薄板坯 

分 类 号：TF777.1[冶金工程—钢铁冶金]